<?php
/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Zend_CodeGenerator
 * @subpackage Php
 * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 * @version    $Id: DefaultValue.php 18010 2009-09-07 21:58:40Z beberlei $
 */

/**
 * A value-holder object for non-expressable parameter default values, such as null, booleans and empty array()
 *
 * @category   Zend
 * @package    Zend_CodeGenerator
 * @subpackage Php
 * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */
class Zend_CodeGenerator_Php_Parameter_DefaultValue
{
	/**
	 * @var string
	 */
	protected $_defaultValue = null;

	/**
	 *
	 * @param string $defaultValue
	 * @throws Zend_CodeGenerator_Php_Exception
	 */
	public function __construct($defaultValue)
	{
		if(!is_string($defaultValue)) {
			require_once "Zend/CodeGenerator/Php/Exception.php";
			throw new Zend_CodeGenerator_Php_Exception(
                "Can only set a string as default value representation, ".
                "but ".gettype($defaultValue)." was given."
                );
		}
		$this->_defaultValue = $defaultValue;
	}

	public function __toString()
	{
		return $this->_defaultValue;
	}
}